Pilot Plant Preparation of an α<sub>v</sub>β<sub>3</sub> Integrin Antagonist. Part 1. Process Research and Development of a (<i>S</i>)-β-Amino Acid Ester Intermediate: Synthesis via a Scalable, Diastereoselective Imino-Reformatsky Reaction
作者:Jerry D. Clark、Gerald A. Weisenburger、D. Keith Anderson、Pierre-Jean Colson、Albert D. Edney、Donald J. Gallagher、H. Peter Kleine、Carl M. Knable、Melissa K. Lantz、Christine M. V. Moore、James B. Murphy、Thomas E. Rogers、Peter G. Ruminski、Ajit S. Shah、Neil Storer、Bruce E. Wise
DOI:10.1021/op034094j
日期:2004.1.1
enantioselective method for preparing (S)-β-amino acid ester 3, a key intermediate to the αvβ3 integrin antagonist 1. Reported are an asymmetric Michael reaction approach, attempts to enantioselectively hydrogenate an enamine, resolution of (±)-3 via diastereomeric salt formation, and a synthetic route employing a novel, diastereoselective imino-Reformatsky reaction. This last research initiative proved
描述了四项过程研究调查,旨在辨别制备 (S)-β-氨基酸酯 3(αvβ3 整合素拮抗剂 1 的关键中间体)的可扩展的对映选择性方法。报告的是不对称迈克尔反应方法,试图对映选择性氢化烯胺,通过非对映体盐的形成拆分 (±)-3,以及采用新型非对映选择性亚氨基-Reformatsky 反应的合成路线。最后一项研究计划被证明是成功的,并被用作初始 API 供应的促成途径。报道了这种使能化学的工艺开发。研究和优化的技术问题是(1)在亚氨基-Reformatsky反应中采用MEM保护以获得高产率和非对映选择性的必要性,